Pub. 988-0151-121 www.lowrance.com X37TX and X47TX Fish-finding & Depth Sounding Sonars Installation and Operation Instructions...
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Introduction... 1 Capabilities and Specifications: X37TX and X47TX ... 1 Installation Instructions... 2 Installation Preparations... 2 Transducer Installation ... 3 Recommended Tools and Supplies... 3 Selecting a Transducer Location ... 4 Shoot-Thru-Hull vs. Transom Mounting... 6 Transom Transducer Assembly and Mounting... 6 Trolling Motor Bracket Installation ...
Display Adjustments... 35 Backlights ... 35 Display Contrast... 36 Battery Voltage... 36 Depth Units of Measure... 36 Preset Unit (Reset All Options)... 36 System Info... 36 Simulator ... 37 Digital Data Size for Depth and Temperature ... 37 Troubleshooting... 38 Warranty and Service Information ...
Thank you for buying a Lowrance sonar designed for both professional and novice fishermen. All Lowrance sonars have an automatic mode that finds and displays the bottom, fish, underwater structure and more – right out of the box. All you have to do is press the on (...
Installation Instructions Installation Preparations You can install the sonar system in some other order if you prefer, but we recommend this installation sequence: Caution: You should read over this entire installation section before...
1. Determine the approximate location for the sonar unit, so you can plan how and where to route the cables for the transducer and power. This will help you make sure you have enough cable length for the desired configuration.
If the transducer is not placed in a smooth flow of water, interference caused by bubbles and turbulence will show on the sonar's display in the form of random lines or dots whenever the boat is moving.
5. If possible, route the transducer cable away from other wiring on the boat. Electrical noise from engine wiring, bilge pumps and aerators can be displayed on the sonar's screen. Use caution when routing the transducer cable around these wires.
Shoot-thru-hull vs. Transom Mounting In a shoot-thru-hull installation, the transducer is bonded to the inside of the hull with epoxy. The sonar "ping" signal actually passes through the hull and into the water. This differs from a bolt-thru-hull installation (often called simply "thru-hull"). In that case, a hole is cut in the hull and a specially designed transducer is mounted through the hull with a threaded shaft and nut.
1. Assembling the bracket. Press the two small plastic ratchets into the sides of the metal bracket as shown in the following illustration. Notice there are letters molded into each ratchet. Place each ratchet into the bracket with the letter "A" aligned with the dot stamped into the metal bracket.
3. Assembling the transducer. position for the ratchets, assemble the transducer as shown in the following figure. Don't tighten the lock nut at this time. Assemble transducer and bracket. 4. Drilling mounting holes. Hold the transducer and bracket assembly against the transom. The transducer should be roughly parallel to the ground.
Align transducer centerline with hull bottom and attach to transom. 6. Route the transducer cable through or over the transom to the sonar unit. Make sure to leave some slack in the cable at the transducer. If possible, route the transducer cable away from other wiring on the boat.
(not included) to attach the transducer cable to the trolling motor shaft. Make sure there is enough slack in the cable for the motor to turn freely. Route the cable to the sonar unit and the transducer is ready for use.
The transducer installation inside a fiberglass hull must be in an area that does not have air bubbles in the resin or separated fiberglass layers. The sonar signal must pass through solid fiberglass. A successful transducer installation can be made on hulls with flotation materials (such as plywood, balsa wood or foam) between layers of fiberglass if the material is removed from the chosen area.
When the job is finished, the hull is watertight and structurally sound. Remember, the sonar signal must pass through solid fiberglass. Any air bubbles in the fiberglass or the epoxy will reduce or eliminate the sonar signals.
1. Anchor the boat in about 30 feet of water. Add a little water to the sump of the boat. Plug the transducer into the sonar unit, turn it on, then hold the transducer over the side of the boat in the water. Adjust the sensitivity and range controls until a second bottom echo is seen on the display.
4. Most people can get good results by following steps 1 through 3, so this step is optional. If you want to make an extra effort to be absolutely sure that your selected location will work under all conditions, make a test run with the boat on plane and observe the bottom signal.
Leave the weight in place for a minimum of three hours. Allow the epoxy to cure for 24 hours before moving the boat. 5. After the epoxy has cured, route the cable to the sonar unit and it's ready to use.
To unit Power and transducer connections for the X37TX and X47TX sonar units (direct battery connection shown). If possible, keep the power cable away from other boat wiring, especially the engine's wires.
[3.03] Front view (left) and side view (right) showing dimensions of the X37TX and X47TX when mounted on quick release bracket. The swivel base (not shown) adds 0.4" (10 mm) to the height. The swivel base width is 4.25" (10.7 cm) and the depth is 3.12" (79.47 mm).
Ratchet Screw hole Power/transducer cable X37TX and X47TX quick release mounting bracket. Slots in the base allow routing the cable from beneath the mount. Shown on swivel base. Attach the unit to the bracket by first connecting the power/transducer cable. Then, hold the sonar unit vertically and slide it onto the bracket from above.
Portable Sonar Installation Like many Lowrance products, these sonar units are capable of portable operation. The X37TX and X47TX use the optional PPP-12 portable power pack. The power pack and portable or floating transducers expand the uses for your sonar.
AA alkaline batteries. To use a portable power pack, you simply install the batteries and then attach the sonar unit to the power pack's bracket. Plug in the power/transducer cable and you're ready to fish. The PPP-12 has a quick-release mounting bracket built into the case.
In cold weather the efficiency of dry cell batteries drops with the temperature. We find it a good idea to have the batteries and the sonar unit good and warm before we leave home. If the batteries do lose a charge, you can sometimes restore them by placing them in a warm room or car interior.
Moisten the cup, then press it onto the hull as firmly as possible. Tie the nylon cord to the boat and route the transducer cable to the sonar unit. Your portable sonar is now ready for use.
4. UP and DOWN ARROWS These keys appear in the manual text as these keys to adjust virtually every feature and function on the sonar unit. Operation X47TX sonar, front view, showing screen and keyboard.
When the sonar unit is first turned on and the backlight menu disappears, the display screen shows the Full Chart Page, or mode. The Fish I.D. fish symbol feature is off. The depth range shows on the...
In the following figure, the screen shows a depth range from 0 to 80 feet and the bottom depth is 37.9 feet, shown by the digital sonar. The water temperature is 34.5° F. Digital depth...
The bottom signal scrolls across the screen from right to left. The line at the top of the screen represents the surface. The bottom depth (as determined by the digital sonar) shows in the upper left corner. Digital depth...
menu. Use the arrow keys to select a desired depth range. ANGE When you're finished, press This unit has the following depth ranges: 10, 20, 40, 80, 160, 320 and 640 feet. Range Size menu with manual depth range set to 40 feet. This in effect "zooms"...
When you Zoom while the unit is in manual depth Range Zoom mode, you can select one of 13 pre-set Zoom Sizes. This lets you enlarge some other particular segment of the water column. To do this, first make sure the depth Range Zoom is in manual mode. (See previous instructions for Depth Range Zoom.) Next, press the key until the MENU...
In your unit, auto mode will let you increase sensitivity to 100 percent, but the unit will limit your minimum setting. This prevents you from turning sensitivity down too low to allow automatic bottom tracking. When you change the setting with auto turned on, the unit will continue to track the bottom and make minor adjustments to the sensitivity level, with a bias toward the setting you selected.
Since Grayline shows the difference between strong and weak signals, adjusting the sensitivity may also require a different Grayline level. The level chosen by the sonar unit at power on is usually adequate for most conditions. Experiment with your unit to find the Grayline setting that's best for you.
Thin or no Grayline At left, little Grayline indicates a soft bottom, probably sand or mud. At right, the wider Grayline indicates a harder, rocky bottom. Press UP ARROW decrease it. The percentage of Grayline in use shows in this menu. Echoes scrolling onto the screen will also show the effects of the Grayline change.
Fish I.D. is an easier way for a sonar novice to recognize a fishy signal return when he sees it. However, locating fish by symbol only has some limitations. Your sonar unit's microcomputer is sophisticated, but it can be fooled. It can't distinguish between fish and other suspended objects such as trotlines, turtles, submerged floats, air bubbles, etc.
50 percent. When you are stationary and a fish swims through the sonar signal cone, the image appears on the screen as a long line instead of a fish arch. Reducing the chart speed may result in a shorter line that more closely resembles a regular fish return.
ASP is an effective tool in combating noise. In sonar terms, noise is any undesired signal. It is caused by electrical and mechanical sources such as bilge pumps, engine ignition systems and wiring, air bubbles passing over the face of the transducer, even vibration from the engine. In all cases, noise can produce unwanted marks on the display.
a tone when the bottom goes deeper than its setting. Both alarms adjust the same way, although through different menus. Shallow Alarm To set the shallow alarm depth, press repeatedly until Press UP ARROW setting or press the shallow alarm’s menu box shows the current shallow alarm setting.
DISPLAY CONTRAST The unit’s display contrast is adjustable to suit different lighting conditions. This will help you see the screen from different angles or at various times of the day. The default setting is min (minimum) percent. To adjust the contrast, press menu appears.
SIMULATOR This unit has a built-in simulator that shows a simulated bottom signal with fish signals. This lets you practice with the unit as if you were on the water; all features and functions of the unit are usable. A message appears occasionally to remind you that the simulator is on.
Rerouting the power and transducer cables away from other electrical wiring on the boat may help. Route the sonar unit's power cable directly to the battery instead of through a fuse block or ignition switch 2.
This can cause the unit to eliminate weaker signals such as fish or even structure from the display. 3. The water may be deeper than the sonar's ability to find the bottom. If the sonar can't find the bottom signal while it's in the automatic mode, the digital sonar display will flash continuously.
With the boat at rest in the water, the first thing you should do is turn all electrical equipment on the boat off. Make sure the engine is also off. Turn your sonar on, then turn off Noise Reject [also known as the ASP feature (Advanced Signal Processing)].
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